Bacterial endophytes can offer several benefits to the host plant, particularly growth promotion as phytohormone biosynthesis, phosphate solubilization, siderophore production and stimulation of nutrient adsorption, and increase of pathogen resistance of host plants. In this study, there were 04 bacterial endophytic strains, namely RH2.1, RH2.2, RH5.1, and RH5.2, isolated from the roots of Ocimum sanctum L., and their plant growth-promoting properties were evaluated. All of these strains exhibited phosphate solubilizing ability, siderophore production, and IAA (indole-3-acetic acid) synthesis. Among the strains, RH2.2 showed the highest IAA-producing activity after 72 hours of incubation at pH 7.0 and a temperature of 30-35oC in a culture medium containing glucose, lactose, and peptone as carbon and nitrogen sources. These selected endophytic bacteria may be used as the potential materials for microbial inoculants to develop sustainable agriculture production.